html - Bootstrap 列在小屏幕尺寸(移动设备)中不响应
问题描述
我有一个使用引导程序构建的页面。“服务”部分以 lg 和 md 大小正确显示,但不能以 sm 或 xs(移动)大小显示。我在这里想念什么。我试过包括 col-sm-12 和 col-xs-12,但是当我将屏幕尺寸缩小到移动设备时,它确实会响应。任何帮助表示赞赏。如果您想查看该网站,请点击此处的链接: http: //pctechtips.org/apps/itcomp/
<div class="py-4 bg-light" id="prices">
<div class="container">
<div class="row">
<div class="col-md-12">
<h1 class="text-center">Service Prices</h1>
</div>
</div>
<div class="row">
<div class="col-md-12">
<p class="lead text-center">Bellow you can see a brief description of our services and price. These fall into three main category: Desktop Support, System Maintanance, and Network Installation. If you would like to know more details, go to the Service page.</p>
</div>
</div>
<div class="row">
<div class="col-md-4 p-3">
<div class="card box-shadow rounded border border-secondary" >
<img class="card-img-top" src="assets/styleguide/thinkstockphotos-479282847.jpg">
<div class="card-body">
<h3 class="text-center">Desktop Support</h3>
<p class="card-text">We provide online or in person Desktop Support by helping user solve technical issues. We fix computers, laptops: adding memory (RAM), replacing hard drive, data migration, virus removal, slow computer.</p>
<div class="d-flex justify-content-between align-items-center">
<a class="btn btn-primary" href="services.html#services">learn more</a>
<h5 contenteditable="true">60 $ 1hr</h5>
</div>
</div>
</div>
</div>
<div class="col-md-4 p-3">
<div class="card box-shadow border border-secondary rounded">
<img class="card-img-top" src="assets/styleguide/photo-1506399309177-3b43e99fead2.jpg">
<div class="card-body">
<h3 class="text-center">System Administration</h3>
<p class="card-text">We provide Windows Server and Linux Server administration. This includes checking logs. Schedule regular backups. User administration to make sure user have access to network resources.</p>
<div class="d-flex justify-content-between align-items-center">
<a class="btn btn-primary" href="services.html#services">learn more</a>
<h5 style="">100 $ 1hr</h5>
</div>
</div>
</div>
</div>
<div class="col-md-4 p-3">
<div class="card box-shadow border border-secondary rounded">
<img class="card-img-top" src="assets/styleguide/photo-1544197150-b99a580bb7a8.jpg">
<div class="card-body">
<h3 class="text-center">Network Installation</h3>
<p class="card-text">Whether is a small or large project we will be able to assist you. We can assist with installation of network devices like router, switches, firewall, modems, wireless access points, network printers, servers.</p>
<div class="d-flex justify-content-between align-items-center">
<a class="btn btn-primary" href="services.html#services">learn more</a>
<h5>150 $ 1hr</h5>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
解决方案
包括元标记你的头标记
<meta name="viewport" content="width=device-width, initial-scale=1.0">
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